Partial Discharge Detection Using Multi-Band Signal Coincidence

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing methods for detecting partial discharge in medium and high voltage equipment are expensive and fail to reliably distinguish partial discharge emissions from interfering radio transmissions in a crowded frequency spectrum, necessitating improved continuous, on-line monitoring systems.

Innovation Solution

A method and system using narrow band detectors to sample multiple frequency bands simultaneously, verifying temporal coincidence and pulse shape correlation to identify partial discharge, while rejecting non-recurring and randomly phased signals, and employing bandpass filters and coincidence filters to validate the presence of partial discharge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If narrow band detectors are used to avoid radio signals in crowded frequency spectrum, then frequency selectivity is improved, but frequency bandwidth coverage deteriorates

Engineering Contradiction:

Improvefrequency selectivityVSAvoidfrequency bandwidth coverage

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The frequency spectrum is segmented into multiple narrow frequency bands, each monitored by a dedicated narrow band detector. This segmentation allows the system to maintain high frequency selectivity in each band while collectively covering a broad frequency range, resolving the contradiction between narrow band detection and broad bandwidth coverage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system employs multiple narrow band detectors that collectively perform the function of a broad band detector. Each detector is specialized for a specific frequency band, but the ensemble of detectors provides universal coverage across the entire frequency spectrum of interest, enabling both high selectivity and broad coverage.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple frequency bands are monitored simultaneously, then detection coverage is improved, but system complexity increases

Engineering Contradiction:

Improvedetection coverageVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The monitoring system is segmented into independent narrow band detector channels, each handling a specific frequency band. This segmentation allows parallel processing of multiple bands without requiring complex inter-band coordination, reducing overall system complexity while maintaining broad detection coverage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple narrow band detectors are merged into a unified detection system that processes frequency bands simultaneously. The combination of parallel detector outputs provides comprehensive detection coverage while the modular architecture keeps system complexity manageable through standardized detector modules.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If continuous on-line monitoring is implemented, then preventive maintenance capability is improved, but cost increases

Engineering Contradiction:

Improvepreventive maintenance capabilityVSAvoidmonitoring system cost

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system uses inexpensive narrow band detectors that can be deployed in multiple frequency bands without requiring expensive broad band equipment. This approach provides continuous monitoring capability at lower cost by using multiple affordable specialized detectors rather than one expensive general-purpose detector.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The narrow band detectors are designed to be self-contained units that independently monitor their assigned frequency bands and provide outputs that can be directly processed. This self-service capability reduces the need for complex centralized processing equipment, lowering overall system cost while enabling continuous monitoring.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances the reliability and accuracy of partial discharge detection by distinguishing genuine signals from interference, enabling continuous monitoring without disrupting power systems and reducing false positives.

Implementation Method 1

receiving electromagnetic signals using one or more antennas placed in the vicinity of said electric power equipment at a location selected to acquire radiation induced by the partial discharge

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Implementation Method 2

submitting output electrical signals of said one or more antennas to a set of bandpass filters of different passbands

Methodology Applied

Scientific EffectFrequency filtering: Filter (electronic)

Data Source

PatentUS20250341560A1Multi-band detection and classification of partial discharge

Publication Date: 2025.11.06 OSENSA INNOVATIONS CORP

AI summary

A method for detecting a partial discharge in electric power equipment is disclosed. Two or more narrowband signals corresponding to respective frequency bands of the partial discharge are obtained by two or more receivers, and a temporal coincidence of the two or more narrowband signals is detected, thereby indicating a possible presence of the partial discharge. Then a synchronous recurrence of the partial discharge over a plurality of power cycles is determined, thereby validating the possible presence of the partial discharge. A corresponding system is also provided.